1 /* 2 * Voltage regulator support for AMS AS3722 PMIC 3 * 4 * Copyright (C) 2013 ams 5 * 6 * Author: Florian Lobmaier <florian.lobmaier@ams.com> 7 * Author: Laxman Dewangan <ldewangan@nvidia.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 */ 24 25 #include <linux/err.h> 26 #include <linux/kernel.h> 27 #include <linux/module.h> 28 #include <linux/mfd/as3722.h> 29 #include <linux/of.h> 30 #include <linux/of_platform.h> 31 #include <linux/platform_device.h> 32 #include <linux/regulator/driver.h> 33 #include <linux/regulator/machine.h> 34 #include <linux/regulator/of_regulator.h> 35 #include <linux/slab.h> 36 37 /* Regulator IDs */ 38 enum as3722_regulators_id { 39 AS3722_REGULATOR_ID_SD0, 40 AS3722_REGULATOR_ID_SD1, 41 AS3722_REGULATOR_ID_SD2, 42 AS3722_REGULATOR_ID_SD3, 43 AS3722_REGULATOR_ID_SD4, 44 AS3722_REGULATOR_ID_SD5, 45 AS3722_REGULATOR_ID_SD6, 46 AS3722_REGULATOR_ID_LDO0, 47 AS3722_REGULATOR_ID_LDO1, 48 AS3722_REGULATOR_ID_LDO2, 49 AS3722_REGULATOR_ID_LDO3, 50 AS3722_REGULATOR_ID_LDO4, 51 AS3722_REGULATOR_ID_LDO5, 52 AS3722_REGULATOR_ID_LDO6, 53 AS3722_REGULATOR_ID_LDO7, 54 AS3722_REGULATOR_ID_LDO9, 55 AS3722_REGULATOR_ID_LDO10, 56 AS3722_REGULATOR_ID_LDO11, 57 AS3722_REGULATOR_ID_MAX, 58 }; 59 60 struct as3722_register_mapping { 61 u8 regulator_id; 62 const char *name; 63 const char *sname; 64 u8 vsel_reg; 65 u8 vsel_mask; 66 int n_voltages; 67 u32 enable_reg; 68 u8 enable_mask; 69 u32 control_reg; 70 u8 mode_mask; 71 u32 sleep_ctrl_reg; 72 u8 sleep_ctrl_mask; 73 }; 74 75 struct as3722_regulator_config_data { 76 struct regulator_init_data *reg_init; 77 bool enable_tracking; 78 int ext_control; 79 }; 80 81 struct as3722_regulators { 82 struct device *dev; 83 struct as3722 *as3722; 84 struct regulator_dev *rdevs[AS3722_REGULATOR_ID_MAX]; 85 struct regulator_desc desc[AS3722_REGULATOR_ID_MAX]; 86 struct as3722_regulator_config_data 87 reg_config_data[AS3722_REGULATOR_ID_MAX]; 88 }; 89 90 static const struct as3722_register_mapping as3722_reg_lookup[] = { 91 { 92 .regulator_id = AS3722_REGULATOR_ID_SD0, 93 .name = "as3722-sd0", 94 .vsel_reg = AS3722_SD0_VOLTAGE_REG, 95 .vsel_mask = AS3722_SD_VSEL_MASK, 96 .enable_reg = AS3722_SD_CONTROL_REG, 97 .enable_mask = AS3722_SDn_CTRL(0), 98 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG, 99 .sleep_ctrl_mask = AS3722_SD0_EXT_ENABLE_MASK, 100 .control_reg = AS3722_SD0_CONTROL_REG, 101 .mode_mask = AS3722_SD0_MODE_FAST, 102 .n_voltages = AS3722_SD0_VSEL_MAX + 1, 103 }, 104 { 105 .regulator_id = AS3722_REGULATOR_ID_SD1, 106 .name = "as3722-sd1", 107 .vsel_reg = AS3722_SD1_VOLTAGE_REG, 108 .vsel_mask = AS3722_SD_VSEL_MASK, 109 .enable_reg = AS3722_SD_CONTROL_REG, 110 .enable_mask = AS3722_SDn_CTRL(1), 111 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG, 112 .sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK, 113 .control_reg = AS3722_SD1_CONTROL_REG, 114 .mode_mask = AS3722_SD1_MODE_FAST, 115 .n_voltages = AS3722_SD0_VSEL_MAX + 1, 116 }, 117 { 118 .regulator_id = AS3722_REGULATOR_ID_SD2, 119 .name = "as3722-sd2", 120 .sname = "vsup-sd2", 121 .vsel_reg = AS3722_SD2_VOLTAGE_REG, 122 .vsel_mask = AS3722_SD_VSEL_MASK, 123 .enable_reg = AS3722_SD_CONTROL_REG, 124 .enable_mask = AS3722_SDn_CTRL(2), 125 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG, 126 .sleep_ctrl_mask = AS3722_SD2_EXT_ENABLE_MASK, 127 .control_reg = AS3722_SD23_CONTROL_REG, 128 .mode_mask = AS3722_SD2_MODE_FAST, 129 .n_voltages = AS3722_SD2_VSEL_MAX + 1, 130 }, 131 { 132 .regulator_id = AS3722_REGULATOR_ID_SD3, 133 .name = "as3722-sd3", 134 .sname = "vsup-sd3", 135 .vsel_reg = AS3722_SD3_VOLTAGE_REG, 136 .vsel_mask = AS3722_SD_VSEL_MASK, 137 .enable_reg = AS3722_SD_CONTROL_REG, 138 .enable_mask = AS3722_SDn_CTRL(3), 139 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG, 140 .sleep_ctrl_mask = AS3722_SD3_EXT_ENABLE_MASK, 141 .control_reg = AS3722_SD23_CONTROL_REG, 142 .mode_mask = AS3722_SD3_MODE_FAST, 143 .n_voltages = AS3722_SD2_VSEL_MAX + 1, 144 }, 145 { 146 .regulator_id = AS3722_REGULATOR_ID_SD4, 147 .name = "as3722-sd4", 148 .sname = "vsup-sd4", 149 .vsel_reg = AS3722_SD4_VOLTAGE_REG, 150 .vsel_mask = AS3722_SD_VSEL_MASK, 151 .enable_reg = AS3722_SD_CONTROL_REG, 152 .enable_mask = AS3722_SDn_CTRL(4), 153 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG, 154 .sleep_ctrl_mask = AS3722_SD4_EXT_ENABLE_MASK, 155 .control_reg = AS3722_SD4_CONTROL_REG, 156 .mode_mask = AS3722_SD4_MODE_FAST, 157 .n_voltages = AS3722_SD2_VSEL_MAX + 1, 158 }, 159 { 160 .regulator_id = AS3722_REGULATOR_ID_SD5, 161 .name = "as3722-sd5", 162 .sname = "vsup-sd5", 163 .vsel_reg = AS3722_SD5_VOLTAGE_REG, 164 .vsel_mask = AS3722_SD_VSEL_MASK, 165 .enable_reg = AS3722_SD_CONTROL_REG, 166 .enable_mask = AS3722_SDn_CTRL(5), 167 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG, 168 .sleep_ctrl_mask = AS3722_SD5_EXT_ENABLE_MASK, 169 .control_reg = AS3722_SD5_CONTROL_REG, 170 .mode_mask = AS3722_SD5_MODE_FAST, 171 .n_voltages = AS3722_SD2_VSEL_MAX + 1, 172 }, 173 { 174 .regulator_id = AS3722_REGULATOR_ID_SD6, 175 .name = "as3722-sd6", 176 .vsel_reg = AS3722_SD6_VOLTAGE_REG, 177 .vsel_mask = AS3722_SD_VSEL_MASK, 178 .enable_reg = AS3722_SD_CONTROL_REG, 179 .enable_mask = AS3722_SDn_CTRL(6), 180 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG, 181 .sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK, 182 .control_reg = AS3722_SD6_CONTROL_REG, 183 .mode_mask = AS3722_SD6_MODE_FAST, 184 .n_voltages = AS3722_SD0_VSEL_MAX + 1, 185 }, 186 { 187 .regulator_id = AS3722_REGULATOR_ID_LDO0, 188 .name = "as3722-ldo0", 189 .sname = "vin-ldo0", 190 .vsel_reg = AS3722_LDO0_VOLTAGE_REG, 191 .vsel_mask = AS3722_LDO0_VSEL_MASK, 192 .enable_reg = AS3722_LDOCONTROL0_REG, 193 .enable_mask = AS3722_LDO0_CTRL, 194 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG, 195 .sleep_ctrl_mask = AS3722_LDO0_EXT_ENABLE_MASK, 196 .n_voltages = AS3722_LDO0_NUM_VOLT, 197 }, 198 { 199 .regulator_id = AS3722_REGULATOR_ID_LDO1, 200 .name = "as3722-ldo1", 201 .sname = "vin-ldo1-6", 202 .vsel_reg = AS3722_LDO1_VOLTAGE_REG, 203 .vsel_mask = AS3722_LDO_VSEL_MASK, 204 .enable_reg = AS3722_LDOCONTROL0_REG, 205 .enable_mask = AS3722_LDO1_CTRL, 206 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG, 207 .sleep_ctrl_mask = AS3722_LDO1_EXT_ENABLE_MASK, 208 .n_voltages = AS3722_LDO_NUM_VOLT, 209 }, 210 { 211 .regulator_id = AS3722_REGULATOR_ID_LDO2, 212 .name = "as3722-ldo2", 213 .sname = "vin-ldo2-5-7", 214 .vsel_reg = AS3722_LDO2_VOLTAGE_REG, 215 .vsel_mask = AS3722_LDO_VSEL_MASK, 216 .enable_reg = AS3722_LDOCONTROL0_REG, 217 .enable_mask = AS3722_LDO2_CTRL, 218 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG, 219 .sleep_ctrl_mask = AS3722_LDO2_EXT_ENABLE_MASK, 220 .n_voltages = AS3722_LDO_NUM_VOLT, 221 }, 222 { 223 .regulator_id = AS3722_REGULATOR_ID_LDO3, 224 .name = "as3722-ldo3", 225 .name = "vin-ldo3-4", 226 .vsel_reg = AS3722_LDO3_VOLTAGE_REG, 227 .vsel_mask = AS3722_LDO3_VSEL_MASK, 228 .enable_reg = AS3722_LDOCONTROL0_REG, 229 .enable_mask = AS3722_LDO3_CTRL, 230 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG, 231 .sleep_ctrl_mask = AS3722_LDO3_EXT_ENABLE_MASK, 232 .n_voltages = AS3722_LDO3_NUM_VOLT, 233 }, 234 { 235 .regulator_id = AS3722_REGULATOR_ID_LDO4, 236 .name = "as3722-ldo4", 237 .name = "vin-ldo3-4", 238 .vsel_reg = AS3722_LDO4_VOLTAGE_REG, 239 .vsel_mask = AS3722_LDO_VSEL_MASK, 240 .enable_reg = AS3722_LDOCONTROL0_REG, 241 .enable_mask = AS3722_LDO4_CTRL, 242 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG, 243 .sleep_ctrl_mask = AS3722_LDO4_EXT_ENABLE_MASK, 244 .n_voltages = AS3722_LDO_NUM_VOLT, 245 }, 246 { 247 .regulator_id = AS3722_REGULATOR_ID_LDO5, 248 .name = "as3722-ldo5", 249 .sname = "vin-ldo2-5-7", 250 .vsel_reg = AS3722_LDO5_VOLTAGE_REG, 251 .vsel_mask = AS3722_LDO_VSEL_MASK, 252 .enable_reg = AS3722_LDOCONTROL0_REG, 253 .enable_mask = AS3722_LDO5_CTRL, 254 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG, 255 .sleep_ctrl_mask = AS3722_LDO5_EXT_ENABLE_MASK, 256 .n_voltages = AS3722_LDO_NUM_VOLT, 257 }, 258 { 259 .regulator_id = AS3722_REGULATOR_ID_LDO6, 260 .name = "as3722-ldo6", 261 .sname = "vin-ldo1-6", 262 .vsel_reg = AS3722_LDO6_VOLTAGE_REG, 263 .vsel_mask = AS3722_LDO_VSEL_MASK, 264 .enable_reg = AS3722_LDOCONTROL0_REG, 265 .enable_mask = AS3722_LDO6_CTRL, 266 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG, 267 .sleep_ctrl_mask = AS3722_LDO6_EXT_ENABLE_MASK, 268 .n_voltages = AS3722_LDO_NUM_VOLT, 269 }, 270 { 271 .regulator_id = AS3722_REGULATOR_ID_LDO7, 272 .name = "as3722-ldo7", 273 .sname = "vin-ldo2-5-7", 274 .vsel_reg = AS3722_LDO7_VOLTAGE_REG, 275 .vsel_mask = AS3722_LDO_VSEL_MASK, 276 .enable_reg = AS3722_LDOCONTROL0_REG, 277 .enable_mask = AS3722_LDO7_CTRL, 278 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG, 279 .sleep_ctrl_mask = AS3722_LDO7_EXT_ENABLE_MASK, 280 .n_voltages = AS3722_LDO_NUM_VOLT, 281 }, 282 { 283 .regulator_id = AS3722_REGULATOR_ID_LDO9, 284 .name = "as3722-ldo9", 285 .sname = "vin-ldo9-10", 286 .vsel_reg = AS3722_LDO9_VOLTAGE_REG, 287 .vsel_mask = AS3722_LDO_VSEL_MASK, 288 .enable_reg = AS3722_LDOCONTROL1_REG, 289 .enable_mask = AS3722_LDO9_CTRL, 290 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG, 291 .sleep_ctrl_mask = AS3722_LDO9_EXT_ENABLE_MASK, 292 .n_voltages = AS3722_LDO_NUM_VOLT, 293 }, 294 { 295 .regulator_id = AS3722_REGULATOR_ID_LDO10, 296 .name = "as3722-ldo10", 297 .sname = "vin-ldo9-10", 298 .vsel_reg = AS3722_LDO10_VOLTAGE_REG, 299 .vsel_mask = AS3722_LDO_VSEL_MASK, 300 .enable_reg = AS3722_LDOCONTROL1_REG, 301 .enable_mask = AS3722_LDO10_CTRL, 302 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG, 303 .sleep_ctrl_mask = AS3722_LDO10_EXT_ENABLE_MASK, 304 .n_voltages = AS3722_LDO_NUM_VOLT, 305 }, 306 { 307 .regulator_id = AS3722_REGULATOR_ID_LDO11, 308 .name = "as3722-ldo11", 309 .sname = "vin-ldo11", 310 .vsel_reg = AS3722_LDO11_VOLTAGE_REG, 311 .vsel_mask = AS3722_LDO_VSEL_MASK, 312 .enable_reg = AS3722_LDOCONTROL1_REG, 313 .enable_mask = AS3722_LDO11_CTRL, 314 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG, 315 .sleep_ctrl_mask = AS3722_LDO11_EXT_ENABLE_MASK, 316 .n_voltages = AS3722_LDO_NUM_VOLT, 317 }, 318 }; 319 320 321 static const int as3722_ldo_current[] = { 150000, 300000 }; 322 static const int as3722_sd016_current[] = { 2500000, 3000000, 3500000 }; 323 324 static int as3722_current_to_index(int min_uA, int max_uA, 325 const int *curr_table, int n_currents) 326 { 327 int i; 328 329 for (i = n_currents - 1; i >= 0; i--) { 330 if ((min_uA <= curr_table[i]) && (curr_table[i] <= max_uA)) 331 return i; 332 } 333 return -EINVAL; 334 } 335 336 static int as3722_ldo_get_current_limit(struct regulator_dev *rdev) 337 { 338 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 339 struct as3722 *as3722 = as3722_regs->as3722; 340 int id = rdev_get_id(rdev); 341 u32 val; 342 int ret; 343 344 ret = as3722_read(as3722, as3722_reg_lookup[id].vsel_reg, &val); 345 if (ret < 0) { 346 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", 347 as3722_reg_lookup[id].vsel_reg, ret); 348 return ret; 349 } 350 if (val & AS3722_LDO_ILIMIT_MASK) 351 return 300000; 352 return 150000; 353 } 354 355 static int as3722_ldo_set_current_limit(struct regulator_dev *rdev, 356 int min_uA, int max_uA) 357 { 358 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 359 struct as3722 *as3722 = as3722_regs->as3722; 360 int id = rdev_get_id(rdev); 361 int ret; 362 u32 reg = 0; 363 364 ret = as3722_current_to_index(min_uA, max_uA, as3722_ldo_current, 365 ARRAY_SIZE(as3722_ldo_current)); 366 if (ret < 0) { 367 dev_err(as3722_regs->dev, 368 "Current range min:max = %d:%d does not support\n", 369 min_uA, max_uA); 370 return ret; 371 } 372 if (ret) 373 reg = AS3722_LDO_ILIMIT_BIT; 374 return as3722_update_bits(as3722, as3722_reg_lookup[id].vsel_reg, 375 AS3722_LDO_ILIMIT_MASK, reg); 376 } 377 378 static struct regulator_ops as3722_ldo0_ops = { 379 .is_enabled = regulator_is_enabled_regmap, 380 .enable = regulator_enable_regmap, 381 .disable = regulator_disable_regmap, 382 .list_voltage = regulator_list_voltage_linear, 383 .get_voltage_sel = regulator_get_voltage_sel_regmap, 384 .set_voltage_sel = regulator_set_voltage_sel_regmap, 385 .get_current_limit = as3722_ldo_get_current_limit, 386 .set_current_limit = as3722_ldo_set_current_limit, 387 }; 388 389 static struct regulator_ops as3722_ldo0_extcntrl_ops = { 390 .list_voltage = regulator_list_voltage_linear, 391 .get_voltage_sel = regulator_get_voltage_sel_regmap, 392 .set_voltage_sel = regulator_set_voltage_sel_regmap, 393 .get_current_limit = as3722_ldo_get_current_limit, 394 .set_current_limit = as3722_ldo_set_current_limit, 395 }; 396 397 static int as3722_ldo3_set_tracking_mode(struct as3722_regulators *as3722_reg, 398 int id, u8 mode) 399 { 400 struct as3722 *as3722 = as3722_reg->as3722; 401 402 switch (mode) { 403 case AS3722_LDO3_MODE_PMOS: 404 case AS3722_LDO3_MODE_PMOS_TRACKING: 405 case AS3722_LDO3_MODE_NMOS: 406 case AS3722_LDO3_MODE_SWITCH: 407 return as3722_update_bits(as3722, 408 as3722_reg_lookup[id].vsel_reg, 409 AS3722_LDO3_MODE_MASK, mode); 410 411 default: 412 return -EINVAL; 413 } 414 } 415 416 static int as3722_ldo3_get_current_limit(struct regulator_dev *rdev) 417 { 418 return 150000; 419 } 420 421 static struct regulator_ops as3722_ldo3_ops = { 422 .is_enabled = regulator_is_enabled_regmap, 423 .enable = regulator_enable_regmap, 424 .disable = regulator_disable_regmap, 425 .list_voltage = regulator_list_voltage_linear, 426 .get_voltage_sel = regulator_get_voltage_sel_regmap, 427 .set_voltage_sel = regulator_set_voltage_sel_regmap, 428 .get_current_limit = as3722_ldo3_get_current_limit, 429 }; 430 431 static struct regulator_ops as3722_ldo3_extcntrl_ops = { 432 .list_voltage = regulator_list_voltage_linear, 433 .get_voltage_sel = regulator_get_voltage_sel_regmap, 434 .set_voltage_sel = regulator_set_voltage_sel_regmap, 435 .get_current_limit = as3722_ldo3_get_current_limit, 436 }; 437 438 static const struct regulator_linear_range as3722_ldo_ranges[] = { 439 REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000), 440 REGULATOR_LINEAR_RANGE(1725000, 0x40, 0x7F, 25000), 441 }; 442 443 static struct regulator_ops as3722_ldo_ops = { 444 .is_enabled = regulator_is_enabled_regmap, 445 .enable = regulator_enable_regmap, 446 .disable = regulator_disable_regmap, 447 .map_voltage = regulator_map_voltage_linear_range, 448 .set_voltage_sel = regulator_set_voltage_sel_regmap, 449 .get_voltage_sel = regulator_get_voltage_sel_regmap, 450 .list_voltage = regulator_list_voltage_linear_range, 451 .get_current_limit = as3722_ldo_get_current_limit, 452 .set_current_limit = as3722_ldo_set_current_limit, 453 }; 454 455 static struct regulator_ops as3722_ldo_extcntrl_ops = { 456 .map_voltage = regulator_map_voltage_linear_range, 457 .set_voltage_sel = regulator_set_voltage_sel_regmap, 458 .get_voltage_sel = regulator_get_voltage_sel_regmap, 459 .list_voltage = regulator_list_voltage_linear_range, 460 .get_current_limit = as3722_ldo_get_current_limit, 461 .set_current_limit = as3722_ldo_set_current_limit, 462 }; 463 464 static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev) 465 { 466 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 467 struct as3722 *as3722 = as3722_regs->as3722; 468 int id = rdev_get_id(rdev); 469 u32 val; 470 int ret; 471 472 if (!as3722_reg_lookup[id].control_reg) 473 return -ENOTSUPP; 474 475 ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val); 476 if (ret < 0) { 477 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", 478 as3722_reg_lookup[id].control_reg, ret); 479 return ret; 480 } 481 482 if (val & as3722_reg_lookup[id].mode_mask) 483 return REGULATOR_MODE_FAST; 484 else 485 return REGULATOR_MODE_NORMAL; 486 } 487 488 static int as3722_sd_set_mode(struct regulator_dev *rdev, 489 unsigned int mode) 490 { 491 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 492 struct as3722 *as3722 = as3722_regs->as3722; 493 u8 id = rdev_get_id(rdev); 494 u8 val = 0; 495 int ret; 496 497 if (!as3722_reg_lookup[id].control_reg) 498 return -ERANGE; 499 500 switch (mode) { 501 case REGULATOR_MODE_FAST: 502 val = as3722_reg_lookup[id].mode_mask; 503 case REGULATOR_MODE_NORMAL: /* fall down */ 504 break; 505 default: 506 return -EINVAL; 507 } 508 509 ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg, 510 as3722_reg_lookup[id].mode_mask, val); 511 if (ret < 0) { 512 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n", 513 as3722_reg_lookup[id].control_reg, ret); 514 return ret; 515 } 516 return ret; 517 } 518 519 static int as3722_sd016_get_current_limit(struct regulator_dev *rdev) 520 { 521 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 522 struct as3722 *as3722 = as3722_regs->as3722; 523 int id = rdev_get_id(rdev); 524 u32 val, reg; 525 int mask; 526 int ret; 527 528 switch (id) { 529 case AS3722_REGULATOR_ID_SD0: 530 reg = AS3722_OVCURRENT_REG; 531 mask = AS3722_OVCURRENT_SD0_TRIP_MASK; 532 break; 533 case AS3722_REGULATOR_ID_SD1: 534 reg = AS3722_OVCURRENT_REG; 535 mask = AS3722_OVCURRENT_SD1_TRIP_MASK; 536 break; 537 case AS3722_REGULATOR_ID_SD6: 538 reg = AS3722_OVCURRENT_DEB_REG; 539 mask = AS3722_OVCURRENT_SD6_TRIP_MASK; 540 break; 541 default: 542 return -EINVAL; 543 } 544 ret = as3722_read(as3722, reg, &val); 545 if (ret < 0) { 546 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", 547 reg, ret); 548 return ret; 549 } 550 val &= mask; 551 val >>= ffs(mask) - 1; 552 if (val == 3) 553 return -EINVAL; 554 return as3722_sd016_current[val]; 555 } 556 557 static int as3722_sd016_set_current_limit(struct regulator_dev *rdev, 558 int min_uA, int max_uA) 559 { 560 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 561 struct as3722 *as3722 = as3722_regs->as3722; 562 int id = rdev_get_id(rdev); 563 int ret; 564 int val; 565 int mask; 566 u32 reg; 567 568 ret = as3722_current_to_index(min_uA, max_uA, as3722_sd016_current, 569 ARRAY_SIZE(as3722_sd016_current)); 570 if (ret < 0) { 571 dev_err(as3722_regs->dev, 572 "Current range min:max = %d:%d does not support\n", 573 min_uA, max_uA); 574 return ret; 575 } 576 577 switch (id) { 578 case AS3722_REGULATOR_ID_SD0: 579 reg = AS3722_OVCURRENT_REG; 580 mask = AS3722_OVCURRENT_SD0_TRIP_MASK; 581 break; 582 case AS3722_REGULATOR_ID_SD1: 583 reg = AS3722_OVCURRENT_REG; 584 mask = AS3722_OVCURRENT_SD1_TRIP_MASK; 585 break; 586 case AS3722_REGULATOR_ID_SD6: 587 reg = AS3722_OVCURRENT_DEB_REG; 588 mask = AS3722_OVCURRENT_SD6_TRIP_MASK; 589 break; 590 default: 591 return -EINVAL; 592 } 593 ret <<= ffs(mask) - 1; 594 val = ret & mask; 595 return as3722_update_bits(as3722, reg, mask, val); 596 } 597 598 static const struct regulator_linear_range as3722_sd2345_ranges[] = { 599 REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500), 600 REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000), 601 REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7F, 50000), 602 }; 603 604 static struct regulator_ops as3722_sd016_ops = { 605 .is_enabled = regulator_is_enabled_regmap, 606 .enable = regulator_enable_regmap, 607 .disable = regulator_disable_regmap, 608 .list_voltage = regulator_list_voltage_linear, 609 .map_voltage = regulator_map_voltage_linear, 610 .get_voltage_sel = regulator_get_voltage_sel_regmap, 611 .set_voltage_sel = regulator_set_voltage_sel_regmap, 612 .get_current_limit = as3722_sd016_get_current_limit, 613 .set_current_limit = as3722_sd016_set_current_limit, 614 .get_mode = as3722_sd_get_mode, 615 .set_mode = as3722_sd_set_mode, 616 }; 617 618 static struct regulator_ops as3722_sd016_extcntrl_ops = { 619 .list_voltage = regulator_list_voltage_linear, 620 .map_voltage = regulator_map_voltage_linear, 621 .get_voltage_sel = regulator_get_voltage_sel_regmap, 622 .set_voltage_sel = regulator_set_voltage_sel_regmap, 623 .get_current_limit = as3722_sd016_get_current_limit, 624 .set_current_limit = as3722_sd016_set_current_limit, 625 .get_mode = as3722_sd_get_mode, 626 .set_mode = as3722_sd_set_mode, 627 }; 628 629 static struct regulator_ops as3722_sd2345_ops = { 630 .is_enabled = regulator_is_enabled_regmap, 631 .enable = regulator_enable_regmap, 632 .disable = regulator_disable_regmap, 633 .list_voltage = regulator_list_voltage_linear_range, 634 .map_voltage = regulator_map_voltage_linear_range, 635 .set_voltage_sel = regulator_set_voltage_sel_regmap, 636 .get_voltage_sel = regulator_get_voltage_sel_regmap, 637 .get_mode = as3722_sd_get_mode, 638 .set_mode = as3722_sd_set_mode, 639 }; 640 641 static struct regulator_ops as3722_sd2345_extcntrl_ops = { 642 .list_voltage = regulator_list_voltage_linear_range, 643 .map_voltage = regulator_map_voltage_linear_range, 644 .set_voltage_sel = regulator_set_voltage_sel_regmap, 645 .get_voltage_sel = regulator_get_voltage_sel_regmap, 646 .get_mode = as3722_sd_get_mode, 647 .set_mode = as3722_sd_set_mode, 648 }; 649 650 static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id, 651 int ext_pwr_ctrl) 652 { 653 int ret; 654 unsigned int val; 655 656 if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) || 657 (ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3)) 658 return -EINVAL; 659 660 val = ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1); 661 ret = as3722_update_bits(as3722_regs->as3722, 662 as3722_reg_lookup[id].sleep_ctrl_reg, 663 as3722_reg_lookup[id].sleep_ctrl_mask, val); 664 if (ret < 0) 665 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n", 666 as3722_reg_lookup[id].sleep_ctrl_reg, ret); 667 return ret; 668 } 669 670 static struct of_regulator_match as3722_regulator_matches[] = { 671 { .name = "sd0", }, 672 { .name = "sd1", }, 673 { .name = "sd2", }, 674 { .name = "sd3", }, 675 { .name = "sd4", }, 676 { .name = "sd5", }, 677 { .name = "sd6", }, 678 { .name = "ldo0", }, 679 { .name = "ldo1", }, 680 { .name = "ldo2", }, 681 { .name = "ldo3", }, 682 { .name = "ldo4", }, 683 { .name = "ldo5", }, 684 { .name = "ldo6", }, 685 { .name = "ldo7", }, 686 { .name = "ldo9", }, 687 { .name = "ldo10", }, 688 { .name = "ldo11", }, 689 }; 690 691 static int as3722_get_regulator_dt_data(struct platform_device *pdev, 692 struct as3722_regulators *as3722_regs) 693 { 694 struct device_node *np; 695 struct as3722_regulator_config_data *reg_config; 696 u32 prop; 697 int id; 698 int ret; 699 700 np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); 701 if (!np) { 702 dev_err(&pdev->dev, "Device is not having regulators node\n"); 703 return -ENODEV; 704 } 705 pdev->dev.of_node = np; 706 707 ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches, 708 ARRAY_SIZE(as3722_regulator_matches)); 709 if (ret < 0) { 710 dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n", 711 ret); 712 return ret; 713 } 714 715 for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) { 716 struct device_node *reg_node; 717 718 reg_config = &as3722_regs->reg_config_data[id]; 719 reg_config->reg_init = as3722_regulator_matches[id].init_data; 720 reg_node = as3722_regulator_matches[id].of_node; 721 722 if (!reg_config->reg_init || !reg_node) 723 continue; 724 725 ret = of_property_read_u32(reg_node, "ams,ext-control", &prop); 726 if (!ret) { 727 if (prop < 3) 728 reg_config->ext_control = prop; 729 else 730 dev_warn(&pdev->dev, 731 "ext-control have invalid option: %u\n", 732 prop); 733 } 734 reg_config->enable_tracking = 735 of_property_read_bool(reg_node, "ams,enable-tracking"); 736 } 737 return 0; 738 } 739 740 static int as3722_regulator_probe(struct platform_device *pdev) 741 { 742 struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent); 743 struct as3722_regulators *as3722_regs; 744 struct as3722_regulator_config_data *reg_config; 745 struct regulator_dev *rdev; 746 struct regulator_config config = { }; 747 struct regulator_ops *ops; 748 int id; 749 int ret; 750 751 as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs), 752 GFP_KERNEL); 753 if (!as3722_regs) 754 return -ENOMEM; 755 756 as3722_regs->dev = &pdev->dev; 757 as3722_regs->as3722 = as3722; 758 platform_set_drvdata(pdev, as3722_regs); 759 760 ret = as3722_get_regulator_dt_data(pdev, as3722_regs); 761 if (ret < 0) 762 return ret; 763 764 config.dev = &pdev->dev; 765 config.driver_data = as3722_regs; 766 config.regmap = as3722->regmap; 767 768 for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) { 769 reg_config = &as3722_regs->reg_config_data[id]; 770 771 as3722_regs->desc[id].name = as3722_reg_lookup[id].name; 772 as3722_regs->desc[id].supply_name = as3722_reg_lookup[id].sname; 773 as3722_regs->desc[id].id = as3722_reg_lookup[id].regulator_id; 774 as3722_regs->desc[id].n_voltages = 775 as3722_reg_lookup[id].n_voltages; 776 as3722_regs->desc[id].type = REGULATOR_VOLTAGE; 777 as3722_regs->desc[id].owner = THIS_MODULE; 778 as3722_regs->desc[id].enable_reg = 779 as3722_reg_lookup[id].enable_reg; 780 as3722_regs->desc[id].enable_mask = 781 as3722_reg_lookup[id].enable_mask; 782 as3722_regs->desc[id].vsel_reg = as3722_reg_lookup[id].vsel_reg; 783 as3722_regs->desc[id].vsel_mask = 784 as3722_reg_lookup[id].vsel_mask; 785 switch (id) { 786 case AS3722_REGULATOR_ID_LDO0: 787 if (reg_config->ext_control) 788 ops = &as3722_ldo0_extcntrl_ops; 789 else 790 ops = &as3722_ldo0_ops; 791 as3722_regs->desc[id].min_uV = 825000; 792 as3722_regs->desc[id].uV_step = 25000; 793 as3722_regs->desc[id].linear_min_sel = 1; 794 as3722_regs->desc[id].enable_time = 500; 795 break; 796 case AS3722_REGULATOR_ID_LDO3: 797 if (reg_config->ext_control) 798 ops = &as3722_ldo3_extcntrl_ops; 799 else 800 ops = &as3722_ldo3_ops; 801 as3722_regs->desc[id].min_uV = 620000; 802 as3722_regs->desc[id].uV_step = 20000; 803 as3722_regs->desc[id].linear_min_sel = 1; 804 as3722_regs->desc[id].enable_time = 500; 805 if (reg_config->enable_tracking) { 806 ret = as3722_ldo3_set_tracking_mode(as3722_regs, 807 id, AS3722_LDO3_MODE_PMOS_TRACKING); 808 if (ret < 0) { 809 dev_err(&pdev->dev, 810 "LDO3 tracking failed: %d\n", 811 ret); 812 return ret; 813 } 814 } 815 break; 816 case AS3722_REGULATOR_ID_SD0: 817 case AS3722_REGULATOR_ID_SD1: 818 case AS3722_REGULATOR_ID_SD6: 819 if (reg_config->ext_control) 820 ops = &as3722_sd016_extcntrl_ops; 821 else 822 ops = &as3722_sd016_ops; 823 as3722_regs->desc[id].min_uV = 610000; 824 as3722_regs->desc[id].uV_step = 10000; 825 as3722_regs->desc[id].linear_min_sel = 1; 826 break; 827 case AS3722_REGULATOR_ID_SD2: 828 case AS3722_REGULATOR_ID_SD3: 829 case AS3722_REGULATOR_ID_SD4: 830 case AS3722_REGULATOR_ID_SD5: 831 if (reg_config->ext_control) 832 ops = &as3722_sd2345_extcntrl_ops; 833 else 834 ops = &as3722_sd2345_ops; 835 as3722_regs->desc[id].linear_ranges = 836 as3722_sd2345_ranges; 837 as3722_regs->desc[id].n_linear_ranges = 838 ARRAY_SIZE(as3722_sd2345_ranges); 839 break; 840 default: 841 if (reg_config->ext_control) 842 ops = &as3722_ldo_extcntrl_ops; 843 else 844 ops = &as3722_ldo_ops; 845 as3722_regs->desc[id].min_uV = 825000; 846 as3722_regs->desc[id].uV_step = 25000; 847 as3722_regs->desc[id].linear_min_sel = 1; 848 as3722_regs->desc[id].enable_time = 500; 849 as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges; 850 as3722_regs->desc[id].n_linear_ranges = 851 ARRAY_SIZE(as3722_ldo_ranges); 852 break; 853 } 854 as3722_regs->desc[id].ops = ops; 855 config.init_data = reg_config->reg_init; 856 config.of_node = as3722_regulator_matches[id].of_node; 857 rdev = devm_regulator_register(&pdev->dev, 858 &as3722_regs->desc[id], &config); 859 if (IS_ERR(rdev)) { 860 ret = PTR_ERR(rdev); 861 dev_err(&pdev->dev, "regulator %d register failed %d\n", 862 id, ret); 863 return ret; 864 } 865 866 as3722_regs->rdevs[id] = rdev; 867 if (reg_config->ext_control) { 868 ret = regulator_enable_regmap(rdev); 869 if (ret < 0) { 870 dev_err(&pdev->dev, 871 "Regulator %d enable failed: %d\n", 872 id, ret); 873 return ret; 874 } 875 ret = as3722_extreg_init(as3722_regs, id, 876 reg_config->ext_control); 877 if (ret < 0) { 878 dev_err(&pdev->dev, 879 "AS3722 ext control failed: %d", ret); 880 return ret; 881 } 882 } 883 } 884 return 0; 885 } 886 887 static const struct of_device_id of_as3722_regulator_match[] = { 888 { .compatible = "ams,as3722-regulator", }, 889 {}, 890 }; 891 MODULE_DEVICE_TABLE(of, of_as3722_regulator_match); 892 893 static struct platform_driver as3722_regulator_driver = { 894 .driver = { 895 .name = "as3722-regulator", 896 .owner = THIS_MODULE, 897 .of_match_table = of_as3722_regulator_match, 898 }, 899 .probe = as3722_regulator_probe, 900 }; 901 902 module_platform_driver(as3722_regulator_driver); 903 904 MODULE_ALIAS("platform:as3722-regulator"); 905 MODULE_DESCRIPTION("AS3722 regulator driver"); 906 MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>"); 907 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); 908 MODULE_LICENSE("GPL"); 909